Added typed.js for attractive look

[Kallyan01]

Hi, I am a beginner at web dev and just joined the engineering this year and tried to improve your site's look. I used the Typed.js CDN file not the typed.js file, It might not affect site speed. I also added style to it as I know HTML CSS JS so can't check it if everything is ok or not. I edited these files using Brackets when editing The header.html file it can't fetch the CSS only the simple HTML view was there at the live preview.

[dnfadmin]

All CLA requirements met.